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<li class="navelem"><a class="el" href="dir_df9c78dcf3f59a33b12284f95992a64b.html">ripple</a></li><li class="navelem"><a class="el" href="dir_5f536ab1985a8dcd28bcfd618bc58e92.html">basics</a></li> </ul>
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<div class="title">hardened_hash.h</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160;<span class="comment">//------------------------------------------------------------------------------</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment">/*</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment"> This file is part of rippled: https://github.com/ripple/rippled</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="comment"> Copyright (c) 2014 Ripple Labs Inc.</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="comment"></span> </div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;<span class="comment"> Permission to use, copy, modify, and/or distribute this software for any</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="comment"> purpose with or without fee is hereby granted, provided that the above</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="comment"> copyright notice and this permission notice appear in all copies.</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="comment"></span> </div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;<span class="comment"> THE SOFTWARE IS PROVIDED &quot;AS IS&quot; AND THE AUTHOR DISCLAIMS ALL WARRANTIES</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="comment"> WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;<span class="comment"> MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;<span class="comment"> ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;<span class="comment"> WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="comment"> ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;<span class="comment"> OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;<span class="comment">*/</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;<span class="comment">//==============================================================================</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160; </div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;<span class="preprocessor">#ifndef RIPPLE_BASICS_HARDENED_HASH_H_INCLUDED</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160;<span class="preprocessor">#define RIPPLE_BASICS_HARDENED_HASH_H_INCLUDED</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160; </div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;<span class="preprocessor">#include &lt;ripple/beast/hash/hash_append.h&gt;</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;<span class="preprocessor">#include &lt;ripple/beast/hash/xxhasher.h&gt;</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160; </div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160;<span class="preprocessor">#include &lt;<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/cstdint.html">cstdint</a>&gt;</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160;<span class="preprocessor">#include &lt;<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/functional.html">functional</a>&gt;</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;<span class="preprocessor">#include &lt;<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/mutex.html">mutex</a>&gt;</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;<span class="preprocessor">#include &lt;<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/random.html">random</a>&gt;</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;<span class="preprocessor">#include &lt;<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/type_traits.html">type_traits</a>&gt;</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;<span class="preprocessor">#include &lt;<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/unordered_map.html">unordered_map</a>&gt;</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160;<span class="preprocessor">#include &lt;<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/unordered_set.html">unordered_set</a>&gt;</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160;<span class="preprocessor">#include &lt;<a class="codeRef" href="http://en.cppreference.com/w/cpp/header/utility.html">utility</a>&gt;</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160; </div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespaceripple.html">ripple</a> {</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160; </div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160;<span class="keyword">namespace </span>detail {</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160; </div>
<div class="line"><a name="l00039"></a><span class="lineno"><a class="line" href="namespaceripple_1_1detail.html#ab71dc38912727712056be6817a81bcd1"> 39</a></span>&#160;<span class="keyword">using</span> <a class="codeRef" href="http://en.cppreference.com/w/cpp/utility/pair.html">seed_pair</a> = <a class="codeRef" href="http://en.cppreference.com/w/cpp/utility/pair.html">std::pair&lt;std::uint64_t, std::uint64_t&gt;</a>;</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160; </div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160;<span class="keyword">template</span> &lt;<span class="keywordtype">bool</span> = true&gt;</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160;<a class="codeRef" href="http://en.cppreference.com/w/cpp/utility/pair.html">seed_pair</a></div>
<div class="line"><a name="l00043"></a><span class="lineno"><a class="line" href="namespaceripple_1_1detail.html#a249a9f5f4201996e85c94a88e2364843"> 43</a></span>&#160;<a class="code" href="namespaceripple_1_1detail.html#a249a9f5f4201996e85c94a88e2364843">make_seed_pair</a>() noexcept</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160;{</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160; <span class="keyword">struct </span>state_t</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160; {</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160; <a class="codeRef" href="http://en.cppreference.com/w/cpp/thread/mutex.html">std::mutex</a> mutex;</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160; <a class="codeRef" href="http://en.cppreference.com/w/cpp/numeric/random/random_device.html">std::random_device</a> rng;</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160; <a class="codeRef" href="http://en.cppreference.com/w/cpp/numeric/random/mersenne_twister_engine.html">std::mt19937_64</a> gen;</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160; <a class="codeRef" href="http://en.cppreference.com/w/cpp/numeric/random/uniform_int_distribution.html">std::uniform_int_distribution&lt;std::uint64_t&gt;</a> dist;</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160; </div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160; state_t() : gen(rng())</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160; {</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160; }</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160; <span class="comment">// state_t(state_t const&amp;) = delete;</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; <span class="comment">// state_t&amp; operator=(state_t const&amp;) = delete;</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160; };</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160; <span class="keyword">static</span> state_t state;</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160; <a class="codeRef" href="http://en.cppreference.com/w/cpp/thread/lock_guard.html">std::lock_guard</a> lock(state.mutex);</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160; <span class="keywordflow">return</span> {state.dist(state.gen), state.dist(state.gen)};</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160;}</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; </div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160;} <span class="comment">// namespace detail</span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160; </div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">class</span> HashAlgorithm = beast::xxhasher&gt;</div>
<div class="line"><a name="l00096"></a><span class="lineno"><a class="line" href="classripple_1_1hardened__hash.html"> 96</a></span>&#160;<span class="keyword">class </span><a class="code" href="classripple_1_1hardened__hash.html">hardened_hash</a></div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160;{</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160;<span class="keyword">private</span>:</div>
<div class="line"><a name="l00099"></a><span class="lineno"><a class="line" href="classripple_1_1hardened__hash.html#a3765aed06bf6e6296439d0fc70c709a3"> 99</a></span>&#160; <a class="codeRef" href="http://en.cppreference.com/w/cpp/utility/pair.html">detail::seed_pair</a> <a class="code" href="classripple_1_1hardened__hash.html#a3765aed06bf6e6296439d0fc70c709a3">m_seeds</a>;</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160; </div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160;<span class="keyword">public</span>:</div>
<div class="line"><a name="l00102"></a><span class="lineno"><a class="line" href="classripple_1_1hardened__hash.html#a0447c9ec0860439ed67f13cd9d01b732"> 102</a></span>&#160; <span class="keyword">using</span> <a class="code" href="classripple_1_1hardened__hash.html#a0447c9ec0860439ed67f13cd9d01b732">result_type</a> = <span class="keyword">typename</span> HashAlgorithm::result_type;</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160; </div>
<div class="line"><a name="l00104"></a><span class="lineno"><a class="line" href="classripple_1_1hardened__hash.html#ac5fe30a6c4b1f14433a2598323cf8ddf"> 104</a></span>&#160; <a class="code" href="classripple_1_1hardened__hash.html#ac5fe30a6c4b1f14433a2598323cf8ddf">hardened_hash</a>() : <a class="code" href="classripple_1_1hardened__hash.html#a3765aed06bf6e6296439d0fc70c709a3">m_seeds</a>(detail::make_seed_pair&lt;&gt;())</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160; {</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160; }</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160; </div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160; <span class="keyword">template</span> &lt;<span class="keyword">class</span> T&gt;</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160; <a class="code" href="classripple_1_1hardened__hash.html#a0447c9ec0860439ed67f13cd9d01b732">result_type</a></div>
<div class="line"><a name="l00110"></a><span class="lineno"><a class="line" href="classripple_1_1hardened__hash.html#addb99e4c2034d9eb2027345e4f50ce34"> 110</a></span>&#160; <a class="code" href="classripple_1_1hardened__hash.html#addb99e4c2034d9eb2027345e4f50ce34">operator()</a>(T <span class="keyword">const</span>&amp; t) <span class="keyword">const</span> noexcept</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>&#160; {</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>&#160; HashAlgorithm h(<a class="code" href="classripple_1_1hardened__hash.html#a3765aed06bf6e6296439d0fc70c709a3">m_seeds</a>.<a class="codeRef" href="http://en.cppreference.com/w/cpp/utility/pair.html">first</a>, <a class="code" href="classripple_1_1hardened__hash.html#a3765aed06bf6e6296439d0fc70c709a3">m_seeds</a>.<a class="codeRef" href="http://en.cppreference.com/w/cpp/utility/pair.html">second</a>);</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>&#160; <a class="code" href="namespaceripple.html#a9c3a01178261b6e8a98c0ea99f01d154">hash_append</a>(h, t);</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>&#160; <span class="keywordflow">return</span> <span class="keyword">static_cast&lt;</span><a class="code" href="classripple_1_1hardened__hash.html#a0447c9ec0860439ed67f13cd9d01b732">result_type</a><span class="keyword">&gt;</span>(h);</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160; }</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160;};</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160; </div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160;} <span class="comment">// namespace ripple</span></div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>&#160; </div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>&#160;<span class="preprocessor">#endif</span></div>
</div><!-- fragment --></div><!-- contents -->
<div class="ttc" id="auniform_int_distribution_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/numeric/random/uniform_int_distribution.html">std::uniform_int_distribution</a></div></div>
<div class="ttc" id="autility_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/header/utility.html">utility</a></div></div>
<div class="ttc" id="afunctional_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/header/functional.html">functional</a></div></div>
<div class="ttc" id="aunordered_set_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/header/unordered_set.html">unordered_set</a></div></div>
<div class="ttc" id="apair_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/utility/pair.html">std::pair&lt; std::uint64_t, std::uint64_t &gt;</a></div></div>
<div class="ttc" id="arandom_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/header/random.html">random</a></div></div>
<div class="ttc" id="alock_guard_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/thread/lock_guard.html">std::lock_guard</a></div><div class="ttdoc">STL class.</div></div>
<div class="ttc" id="aclassripple_1_1hardened__hash_html_addb99e4c2034d9eb2027345e4f50ce34"><div class="ttname"><a href="classripple_1_1hardened__hash.html#addb99e4c2034d9eb2027345e4f50ce34">ripple::hardened_hash::operator()</a></div><div class="ttdeci">result_type operator()(T const &amp;t) const noexcept</div><div class="ttdef"><b>Definition:</b> <a href="hardened__hash_8h_source.html#l00110">hardened_hash.h:110</a></div></div>
<div class="ttc" id="anamespaceripple_1_1detail_html_a249a9f5f4201996e85c94a88e2364843"><div class="ttname"><a href="namespaceripple_1_1detail.html#a249a9f5f4201996e85c94a88e2364843">ripple::detail::make_seed_pair</a></div><div class="ttdeci">seed_pair make_seed_pair() noexcept</div><div class="ttdef"><b>Definition:</b> <a href="hardened__hash_8h_source.html#l00043">hardened_hash.h:43</a></div></div>
<div class="ttc" id="amersenne_twister_engine_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/numeric/random/mersenne_twister_engine.html">std::mt19937_64</a></div></div>
<div class="ttc" id="aclassripple_1_1hardened__hash_html_a0447c9ec0860439ed67f13cd9d01b732"><div class="ttname"><a href="classripple_1_1hardened__hash.html#a0447c9ec0860439ed67f13cd9d01b732">ripple::hardened_hash::result_type</a></div><div class="ttdeci">typename HashAlgorithm::result_type result_type</div><div class="ttdef"><b>Definition:</b> <a href="hardened__hash_8h_source.html#l00102">hardened_hash.h:102</a></div></div>
<div class="ttc" id="arandom_device_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/numeric/random/random_device.html">std::random_device</a></div></div>
<div class="ttc" id="aclassripple_1_1hardened__hash_html"><div class="ttname"><a href="classripple_1_1hardened__hash.html">ripple::hardened_hash</a></div><div class="ttdoc">Seed functor once per construction.</div><div class="ttdef"><b>Definition:</b> <a href="hardened__hash_8h_source.html#l00096">hardened_hash.h:96</a></div></div>
<div class="ttc" id="acstdint_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/header/cstdint.html">cstdint</a></div></div>
<div class="ttc" id="anamespaceripple_html"><div class="ttname"><a href="namespaceripple.html">ripple</a></div><div class="ttdoc">Use hash_* containers for keys that do not need a cryptographically secure hashing algorithm.</div><div class="ttdef"><b>Definition:</b> <a href="RCLCensorshipDetector_8h_source.html#l00029">RCLCensorshipDetector.h:29</a></div></div>
<div class="ttc" id="aclassripple_1_1hardened__hash_html_a3765aed06bf6e6296439d0fc70c709a3"><div class="ttname"><a href="classripple_1_1hardened__hash.html#a3765aed06bf6e6296439d0fc70c709a3">ripple::hardened_hash::m_seeds</a></div><div class="ttdeci">detail::seed_pair m_seeds</div><div class="ttdef"><b>Definition:</b> <a href="hardened__hash_8h_source.html#l00099">hardened_hash.h:99</a></div></div>
<div class="ttc" id="aclassripple_1_1hardened__hash_html_ac5fe30a6c4b1f14433a2598323cf8ddf"><div class="ttname"><a href="classripple_1_1hardened__hash.html#ac5fe30a6c4b1f14433a2598323cf8ddf">ripple::hardened_hash::hardened_hash</a></div><div class="ttdeci">hardened_hash()</div><div class="ttdef"><b>Definition:</b> <a href="hardened__hash_8h_source.html#l00104">hardened_hash.h:104</a></div></div>
<div class="ttc" id="amutex_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/header/mutex.html">mutex</a></div></div>
<div class="ttc" id="anamespaceripple_html_a9c3a01178261b6e8a98c0ea99f01d154"><div class="ttname"><a href="namespaceripple.html#a9c3a01178261b6e8a98c0ea99f01d154">ripple::hash_append</a></div><div class="ttdeci">void hash_append(Hasher &amp;h, ValidatorBlobInfo const &amp;blobInfo)</div><div class="ttdef"><b>Definition:</b> <a href="ValidatorList_8h_source.html#l00897">ValidatorList.h:897</a></div></div>
<div class="ttc" id="aunordered_map_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/header/unordered_map.html">unordered_map</a></div></div>
<div class="ttc" id="atype_traits_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/header/type_traits.html">type_traits</a></div></div>
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